What valve do I need?

[Boatman]

I have an L2800 that I installed a backhoe a number of years ago. Uses the power beyond from the loader so two hoses with couplers at the rear of the machine. When I have the hoe off I have a short hose that I connect to complete the loop. What I'm looking for is a valve to replace the short loop so one position it's in bypass with nothing connected and the other position it sends power to the implement.

Any suggestions?

 

[Fedup]

"Any suggestions"

Yes. A permanent jumper hose between the two lines with a high pressure ball valve. When you connect the backhoe you close the valve. When you remove the hoe you open the valve. As simple as that.

 

[85Hokie]

I betcha @TheOldHokie will chime in and have the valve and where to buy in a few !

 

[Fedup]

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Too late.

 

[TheOldHokie]

1/2" NPT Carbon Steel 7250 PSI Ball Valve Dynamic DE2-12-NPT | Ball Valves | Hydraulic Valves | Hydraulics | www.surpluscenter.com

1/2 NPT Carbon Steel 7250 PSI Ball Valve Dynamic DE2-12-NPT, Ball Valves, 1/2 NPT CARBON STEEL 7250 PSI BALL VALVE, 1/2 NPT HIGH PRESSURE BALLDynamic,DE2-12-NPT ,

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Too late.

Possibly if he knows exactly what he is doing and how to plumb and use it.
I think this is more what he had in mind

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Either will work if plumbed correctly but I think the 3 way is more intuitive. I also personally prefer SAE ports over NPT.

Dan

 

[Fedup]

I guess I don't know EXACTLY what i'm doing either, because I don't see where that valve simplifies anything.

The valve I mentioned was merely a sample. I don't know what size style plumbing he has so specifics are rather pointless. And yes, I prefer O ring ports myself. Here again, merely an example.

 

[TheOldHokie]

I guess I don't know EXACTLY what i'm doing either, because I don't see where that valve simplifies anything.

The valve I mentioned was merely a sample. I don't know what size style plumbing he has so specifics are rather pointless. And yes, I prefer O ring ports myself. Here again, merely an example.

You know exactly what you are doing and how that shutoff valve circuit works.
What is happening may not be so obvious to someone like the OP who had to ask for help on something so basic.

The 3 port valve simply combines a tee and valve into a single valve. Put the OUT coupler directly on the valve and the oil flow path and operation of the valve should be obvious to the less insightful.

Neither one of us provided a diagram of the plumbing and its quite possible the OP is still scratching his head. So here is mine.

Dan

 

[Fedup]

Okay, I give in. Your design requires one less tee than my idea. I also concede that I can't post diagrams via computer. Maybe someday I'll learn how to do that. The computer is not my second language. Maybe more like eighth, ninth, or tenth.

As for the OP, should he ever return for clarification, I'm sure someone will clue him in.

 

[Russell King]

I’m not sure what he is trying to do but if he wants to have control of a cylinder would that 3 way valve work ok? But for a hydraulic motor I can see the three way would be best.

Or would a spool valve with bypass be more appropriate than a three way valve? Like these Bucher valves:

BUCHER - 12 GPM MANUAL DIRECTIONAL CONTROL STACK VALVES | Trausch Dynamics

1 to 10 work sections per valve stack Load hold check on each section Open or closed center capability Hard Chrome plated spools, body is high strength cast iron, seals are Buna N Compact Construction Parallel circuit (series available) Balanced i...

www.hydraulicstore.com

 

[TheOldHokie]

I’m not sure what he is trying to do but if he wants to have control of a cylinder would that 3 way valve work ok? But for a hydraulic motor I can see the three way would be best.

Or would a spool valve with bypass be more appropriate than a three way valve? Like these Bucher valves:

BUCHER - 12 GPM MANUAL DIRECTIONAL CONTROL STACK VALVES | Trausch Dynamics

1 to 10 work sections per valve stack Load hold check on each section Open or closed center capability Hard Chrome plated spools, body is high strength cast iron, seals are Buna N Compact Construction Parallel circuit (series available) Balanced i...

www.hydraulicstore.com

I believe he simply wants to eliminate the separate loopback hose he currwntly uses.. He needs a selector valve not a directional control valve.

I have that exact selector circuit on my L3901 for the exact same reason. It is used for switching a set of continuos flow ( log splitter) outlets ON/OFF. I used this three port "spool valve" rather than a ball valve. The ball valve is not as "pretty" but its a lot cheaper.

Dan

 

[Chanceywd]

I have used some of those 3 way style on my machine. I find they feed in the side and then to either end as the ball is drilled at a right angle not straight thru.
Maybe a difference in brand but I don't see that diagram as right with the ones I have used.
Bill

 

[TheOldHokie]

I have used some of those 3 way style on my machine. I find they feed in the side and then to either end as the ball is drilled at a right angle not straight thru.
Maybe a difference in brand but I don't see that diagram as right with the ones I have used.
Bill

You could be right about the porting on that particular valve - I did not check. My diagram is meant to be conceptual. I am pretty sure yoo can find a ball valve that matches the diagram..

Dan

 

[mdhughes]

I believe he simply wants to eliminate the separate loopback hose he currwntly uses.. He needs a selector valve not a directional control valve.

I have that exact selector circuit on my L3901 for the exact same reason. It is used for switching a set of continuos flow ( log splitter) outlets ON/OFF. I used this three port "spool valve" rather than a ball valve. The ball valve is not as "pretty" but its a lot cheaper.

Dan

Dan,
I have also wanted to do something like this and I really like you setup. Could you take some more pictures of the way you have the hoses routed to the back of the tractor?

 

[TheOldHokie]

Dan,
I have also wanted to do something like this and I really like you setup. Could you take some more pictures of the way you have the hoses routed to the back of the tractor?

Not complicated. This is how I set it up initially but I am revisting the outlet mounting scheme and the valve will get moved and the outlets will get replumbed.

Dan

 

[MtnViewRanch]

Not complicated. This is how I set it up initially but I am revisting the outlet mounting scheme and the valve will get moved and the outlets will get replumbed.

Dan

View attachment 117131

Dan, I assume that your future alterations of your existing setup are to accommodate a backhoe?

 

[Boatman]

I believe he simply wants to eliminate the separate loopback hose he currwntly uses.. He needs a selector valve not a directional control valve.

I have that exact selector circuit on my L3901 for the exact same reason. It is used for switching a set of continuos flow ( log splitter) outlets ON/OFF. I used this three port "spool valve" rather than a ball valve. The ball valve is not as "pretty" but its a lot cheaper.

Dan

View attachment 117123

View attachment 117126

This is more in the line of what I was thinking. I had already gone through in my mind piping in a ball valve but figured there was something simpler and cleaner than that. My goal is a valve that just had the 2 lines in and 2 ports out. Had looked at this one from Summit but figure I'd ask to see what others use.

Hydraulic Rotary Selector Diverter Valve, 3 Way, 20 GPM, 5000 PSI, #8 SAE Ports

FREE SHIPPING Hydraulic Rotary Selector Diverter Valve, 3 Way, 20 GPM, 5000 PSI, #8 SAE Ports

summit-hydraulics.com

 

[Boatman]

I’m not sure what he is trying to do but if he wants to have control of a cylinder would that 3 way valve work ok? But for a hydraulic motor I can see the three way would be best.

Or would a spool valve with bypass be more appropriate than a three way valve? Like these Bucher valves:

BUCHER - 12 GPM MANUAL DIRECTIONAL CONTROL STACK VALVES | Trausch Dynamics

1 to 10 work sections per valve stack Load hold check on each section Open or closed center capability Hard Chrome plated spools, body is high strength cast iron, seals are Buna N Compact Construction Parallel circuit (series available) Balanced i...

www.hydraulicstore.com

No control of a cylinder. Just want ON or BYPASS.

 

[TheOldHokie]

This is more in the line of what I was thinking. I had already gone through in my mind piping in a ball valve but figured there was something simpler and cleaner than that. My goal is a valve that just had the 2 lines in and 2 ports out. Had looked at this one from Summit but figure I'd ask to see what others use.

Hydraulic Rotary Selector Diverter Valve, 3 Way, 20 GPM, 5000 PSI, #8 SAE Ports

FREE SHIPPING Hydraulic Rotary Selector Diverter Valve, 3 Way, 20 GPM, 5000 PSI, #8 SAE Ports

summit-hydraulics.com

Not exactly = one line (PB) in and two out. In one position PB goes to thr backhoe outlet. In the other it goes to a tee in the return line.

I think thats what your Summit valve does but I will have to look at the full description.

Dan

 

[Boatman]

Not exactly = one line (PB) in and two out. In one position PB goes to thr backhoe outlet. In the other it goes to a tee in the return line.

I think thats what your Summit valve does but I will have to look at the full description.

Dan

Hmmmm... just looked closer at the Summit. 3 ports so I believe it does the same at the Buyers valve you have.

 

[TheOldHokie]

Hmmmm... just looked closer at the Summit. 3 ports so I believe it does the same at the Buyers valve you have.

Hmmmm... just looked closer at the Summit. 3 ports so I believe it does the same at the Buyers valve you have.

Yes - it switches IN between two different OUTSs.

In your application PB gpes to IN.

One of the OUTs goes to backhoe outlet.

The other OUT goes to a tee in the backhoe return line.

Plumbed like this the bsckhoe can be connected/disconnected with engine running:

To hook up backhoe first plug, both backhoe hoses into the cpuplers and then move selector to backhoe position.

To remove backhoe first move selector to 3pt position and then disconnect backhoe hoses.

Dan